JPH1034817A - Apparatus for manufacture of laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously obtain a plurality of laminates each having uniform quality and to shorten a manufacturing lead time by uniformly heating an entire laminate molding block. SOLUTION: This manufacturing apparatus is constituted to alternately laminate sheet-like synthetic resin materials 2 and intermediate plates 1 in a state that the plates 1 are disposed on both upper and lower surfaces to form a laminate molding block 3, to dispose the block 3 between upper and lower heating plates 4, to heat, to pressurize and to mold it. In this case, the apparatus comprises an intermediate plate heating means for heating the plates 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a laminate, which heats and presses a sheet-like synthetic resin material into a laminate.
More specifically, the present invention relates to an apparatus for manufacturing a laminated plate configured to heat an intermediate plate when heating and pressing a laminated molding block formed by alternately stacking a sheet-like synthetic resin material and an intermediate plate.

[0002]

2. Description of the Related Art Heretofore, a laminate having a metal foil on its surface has been obtained by integrally laminating and molding a metal foil and a sheet-like synthetic resin material. A laminate using copper foil or the like as a metal foil and prepreg or the like as a sheet-like synthetic resin material,
Often used for printed circuit boards. Such a laminate is prepared by laminating a metal foil and a prepreg, or a metal foil and an inner layer material and a prepreg, or a metal foil and an inner layer material and an outer layer material and a prepreg, and heating and pressurizing the prepreg. It is molded by melting the constituent synthetic resin and further thermosetting or cooling. The above-mentioned heating and pressurization are performed by a hot press using a heat source such as steam or electric heat.

[0003] In the hot press, a sheet-like synthetic resin material such as a prepreg is pressed from both upper and lower surfaces by a heating plate. When performing lamination molding by such a hot press, generally, a sheet-like synthetic resin material such as a plurality of prepregs or a single prepreg to be a single laminated plate is sandwiched between intermediate plates, and a plurality of sets are stacked and laminated to form a laminated molding block. The laminated block is formed and heated and pressed to obtain a plurality of laminated plates at the same time, thereby increasing production efficiency. The intermediate plate is used to ensure the flatness of each product, and a stainless plate or the like is usually used.

[0004] When the sheet-like synthetic resin materials stacked in multiple layers as described above are heated and pressed by a hot press, the laminated forming blocks are heated from above and below by a pressing plate of a forming press. Therefore, due to a delay in heat transfer and heat radiation from the side surface of the laminated molding block, the heating temperature of the sheet-shaped synthetic resin material on the pressure plate side and that of the intermediate sheet-shaped synthetic resin material are different. Such a non-uniform heating temperature is not preferable because it results in variations in the quality of the obtained laminate. Therefore, in the hot press, the number of sets of sheet-like synthetic resin materials that can be stacked is limited.

As a method for solving such a problem, there is a method disclosed in, for example, British Patent 1321305. In this method, a conductive metal plate is used as an intermediate plate, a sheet-shaped synthetic resin material and a metal foil are interposed between the intermediate plates, and the intermediate plates are stacked in multiple stages. Then, a current is supplied to the intermediate plate, and the intermediate plate is heated as a resistor, and is pressed from above and below to simultaneously form a large number of laminated plates.
According to such a heating method, the heating temperature is uniform in both the stacking direction and the planar direction of the laminate, and the quality variation is reduced.

[0006]

However, in the conventional example of heating the above-mentioned intermediate plate, since the heat escapes to the upper and lower pressing plates, the sheet-like synthetic resin located at a position close to the pressing plate. The material is less likely to be heated. For this reason, the laminated board located at a position close to the pressure plate tends to be insufficiently heated, and the quality of the obtained laminated board varies. In addition, in order to sufficiently heat the laminate located at a position close to the pressure plate, it is necessary to lengthen the heating time, and it takes a long time to manufacture, and the laminate in the middle of the laminate forming block is heated. This is excessive, and again causes quality variation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to uniformly heat the entire laminated molding block to simultaneously obtain a plurality of laminated boards of uniform quality. It is an object of the present invention to provide an apparatus for manufacturing a laminated board, which can shorten the manufacturing lead time while making it possible.

[0008]

According to the first aspect of the present invention, there is provided an intermediate plate having upper and lower intermediate plates arranged alternately on a sheet-like synthetic resin material. An apparatus for manufacturing a laminated board for forming the laminated molding block 3 and disposing the laminated molding block 3 between the upper and lower heating plates 4 and performing heat and pressure molding is provided with an intermediate plate heating means for heating the intermediate plate 1. The feature is constituted.

According to such a laminated plate manufacturing apparatus, since both the heating plate 4 and the intermediate plate 1 are heated, they are heated from the inside and the upper and lower surfaces of the laminated molding block 3 so that the whole is uniformly heated. You.

According to a second aspect of the present invention, in the first aspect, the intermediate plate 1 is formed of a conductive material, and the intermediate plate 1 is heated by energizing the intermediate plate 1. The current supply device 5 is configured as an intermediate plate heating means.

According to such a laminated plate manufacturing apparatus, by energizing the intermediate plate 1, the intermediate plate 1
Is heated.

According to a third aspect of the present invention, in the first aspect, the intermediate plate 1 is formed of a magnetic material, and the high frequency induction heating device 6 for high frequency induction heating the intermediate plate 1 is used as an intermediate plate heating means. The high-frequency induction heating device 6 is characterized by having an induction coil 6a disposed around the laminated molding block 3.

According to such a laminated plate manufacturing apparatus, the intermediate plate 1 is heated by supplying the high frequency current to the induction coil 6a.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the intermediate plate 1 is foldably connected by a conductive connecting member 7.

According to such a laminated plate manufacturing apparatus, the sheet-shaped synthetic resin material 2 is placed on the intermediate plate 1 as the lowermost layer, the intermediate plate 1 is folded on the sheet-shaped synthetic resin material 2, and The laminated molded block 3 can be formed by the procedure of placing the synthetic resin material 2 in a shape.

A fifth aspect of the present invention is characterized in that, in the second aspect of the invention, a connection connector 8 for electrically connecting the intermediate plates 1 to each other is provided.

According to such a laminated plate manufacturing apparatus, the connection connector 8 is mounted, and electricity can be supplied from both ends of the electrically connected intermediate plate 1 to heat it.

The invention according to claim 6 is the invention according to claims 1 to 5
In the invention according to any one of the above,
Is formed by disposing a conductive foil 9 on the surface of the sheet-like synthetic resin material 2 and applying a current to the conductive foil 9 to heat the conductive foil 9. Make up.

According to such an apparatus for manufacturing a laminate, not only the intermediate plate 1 but also the conductive foil 9 can be heated.

[0020] The invention according to claim 7 is the invention according to claims 1 to 6.
The invention according to any one of the above, further comprising an intermediate plate cooling means for cooling the intermediate plate 1.

According to such a laminated plate manufacturing apparatus, after the completion of the heating and press-forming, the intermediate plate 1 is cooled, the cooling is performed from the inside of the laminated forming block 3, and the entire laminated forming block 3 is rapidly and uniformly cooled. be able to.

[0022]

Embodiments of the present invention will be described below.

The first embodiment will be described below with reference to FIGS. FIG. 1 is an explanatory view showing an apparatus for manufacturing a laminated board according to this embodiment, and schematically shows a state where the apparatus is viewed from a side. FIG. 2 shows a sheet-like synthetic resin material 2 formed into a laminate by the same manufacturing apparatus.
FIG. 3 is an explanatory diagram showing a different configuration of the heating plate 4 in the manufacturing apparatus.

As shown in FIG. 1, the apparatus for manufacturing a laminated plate is a molding press that heats and press-molds an object to be molded between upper and lower heating plates 4. This heating plate 4
As shown in the figure, is a relatively thick, highly rigid, flat metal plate made of steel or the like, and is formed so that a rod-shaped electric heater 12 is embedded therein for heating. Alternatively, as shown in FIG. 3, a heating block 4b is integrally provided on a flat pressing plate 4a, and a coil heater is provided on the heating block 4b.
11 may be wound and heated by the coil heater 11.

FIG. 2 shows an example of a sheet-like synthetic resin material 2 to be molded. As shown in FIG. 2, this sheet-like synthetic resin material 2 has an inner layer base material 2b having conductor circuit patterns on both surfaces. And prepreg sheets 2a arranged on both sides of the inner layer base material 2b. And this sheet-shaped synthetic resin material 2 together with the conductive foil 9 arrange | positioned on both sides surface,
The conductive foil 9 is formed into a laminate bonded to the surface by the heat and pressure forming.

As shown in FIG. 1, the combination of the sheet-shaped synthetic resin material 2 and the conductive foil 9 is such that the sheet-shaped synthetic resin material 2 is The intermediate plate 1 and the intermediate plate 1 are alternately stacked to form a laminated molding block 3, which is supplied as a molding between the upper and lower heating plates 4. That is, a large number of combinations of the sheet-shaped synthetic resin material 2 and the conductive foil 9 are formed at the same time so that a large number of laminated boards are obtained at the same time.

By the way, in this laminated plate manufacturing apparatus, as shown in FIG. 1, an intermediate plate heating means for heating the intermediate plate 1 is formed by energizing the intermediate plate 1 to heat the intermediate plate 1. A plate energizing device 5 is provided. In other words, one end of each of the intermediate plates 1 vertically adjacent to each other is connected by wiring, all the intermediate plates 1 are electrically connected vertically, and the heating power supply 5a is connected to both ends of the electrically connected intermediate plates 1. Then, by passing a current, the intermediate plate 1 is heated as a resistor.

In this case, the intermediate plate 1 is made of a conductive material. As a specific example, the surface of an aluminum plate is hard anodized, then impregnated with ethylene tetrafluoride, and has a thickness of 30 to 60 μm. And the like having an electric insulating film formed on the surface thereof are preferably used.

According to such an apparatus for manufacturing a laminated plate, since the heating is performed by both the heating plate 4 and the intermediate plate 1, the heating is performed from the inside and the upper and lower surfaces of the laminated molding block 3 so that the whole is uniformly and uniformly fixed. Heated to temperature.
That is, in the heating by the heating plate 4 alone, the middle temperature of the laminated molding block 3 does not easily rise, and in the heating of the intermediate plate 1 alone, the heat is taken by the upper and lower pressing plates. This eliminates the problem that the temperature rise on the outside is delayed.

Therefore, a plurality of laminated sheets of uniform quality can be obtained at the same time without changing the degree of heating between the individual laminated sheets, and the entire heating time can be reduced for the synthetic resin sheet material 2 whose temperature rise is delayed. There is no need to match them, so that the molding time can be shortened and the manufacturing lead time can be shortened.

A second embodiment will be described below with reference to FIG. FIG. 4 is an explanatory view showing a configuration of a manufacturing apparatus for a laminated plate in this embodiment, and schematically shows a state where the manufacturing apparatus is viewed from a side.

As shown in the figure, the apparatus for manufacturing a laminated plate differs from that of the first embodiment in that it has a high-frequency induction device 6 as an intermediate plate heating means.
That is, the high-frequency induction device 6 includes the laminated molding block 3
It has an induction coil 6a disposed around it. In this case, the intermediate plate 1 is made of a magnetic material. Then, a high-frequency current is supplied from a high-frequency power supply to each of the induction coils 6a disposed around the laminated molding block 3, whereby each of the intermediate plates 1 is subjected to high-frequency induction heating.

That is, compared to the above-described method of conducting and heating, there is no need to connect electrodes for wiring connection and to route electric wires, so that operations such as preparation for molding and removal of molded products are facilitated. Things.

Further, as shown in the illustration of the apparatus of FIG. 5, the connection example of the intermediate plate 1 is shown in the first or second embodiment.
It is also a preferred configuration to be foldably connected. The connecting member 7 in this figure is formed of a flexible aluminum plate.

With such a structure, the sheet-like synthetic resin material 2 is placed on the lowermost intermediate plate 1, the intermediate plate 1 is folded on the sheet-like synthetic resin material 2, and the sheet-like synthetic resin material The stacked molding block 3 can be easily formed by the procedure of placing the block 2.

As shown in the illustration of the apparatus in FIG. 6, different connection examples of the intermediate plate 1 are shown. The connecting member 7 in FIG. 5 is used as a connection connector 8, and the intermediate plates 1 are electrically connected to each other by the connection connector 8. It is one of the preferable structures to use.

FIG. 7 is a schematic sectional view showing an example of the connection connector 8 of the above. The connection connector 8 is provided with insertion openings 8a for fitting and connecting the upper and lower intermediate plates 1 ends 1b. ing. The surfaces of the two insertion ports 8a are formed of a conductive material, and are electrically connected to each other. Also,
In this case, the insulating layer 1a is not formed on the surface of the end portion 1a of the intermediate plate 1 by alumite treatment, and the fitting is connected to the insertion port 8a so that a reliable electric connection is ensured. Has become.

According to such a laminated plate manufacturing apparatus, the connection connector 8 is mounted, and electricity can be supplied from both ends of the electrically connected intermediate plate 1 to heat it. Wiring connection or removal can be easily performed.

A third embodiment will be described below with reference to FIG. FIG. 8 is an explanatory view showing a configuration of a manufacturing apparatus for a laminated plate in this embodiment, and schematically shows a state where the manufacturing apparatus is viewed from a side.

As shown in this figure, in this manufacturing apparatus,
An electrically conductive foil 9 is arranged on the surface of the sheet-shaped synthetic resin material 2 to form the laminated molding block 3, and the electrically conductive foil 9 is energized to heat the electrically conductive foil 9.

In this case, in particular, two long conductive foils 9 are used in layers, and these two conductive foils 9 are alternately bent and passed between the intermediate plates 1. The sheet-shaped synthetic resin material 2 is sandwiched between the two conductive foils 9, and stacked such that the intermediate plate 1 is arranged on the front side of the sandwiched conductive foils 9. Thus, a laminated molding block 3 is formed. A power source 10a is connected to both ends of the conductive foil 9 so that the conductive foil 9 can be heated by conduction. The heating of the intermediate plate 1 is performed by high-frequency induction heating as described in the second embodiment.

According to such a laminated plate manufacturing apparatus, in addition to the intermediate plate 1, the conductive foil 9 can be heated, and the heating capacity from the inside of the laminated molded block 3 is increased, so that the heating can be performed quickly. Molding time can be shortened.

Further, it is preferable that each apparatus having the above-mentioned configuration has an intermediate plate cooling means for cooling the intermediate plate 1. According to such an intermediate plate cooling means, the intermediate plate 1 can be cooled after the completion of the heat and pressure molding, and can be cooled from the inside of the laminated molding block 3 to quickly and uniformly cool the entire laminated molding block 3. Cooling time can be greatly reduced. In addition, if it is configured to cool while applying pressure, it is possible to prevent the base material such as the glass cloth constituting the prepreg from floating on the surface of the obtained laminated board, thereby preventing the surface roughness from deteriorating. In a circuit laminate, a fine circuit pattern can be easily formed on the surface.

FIG. 9 is a perspective view showing a specific example of such an intermediate plate cooling means, in which a pipe 1a for passing a cooling fluid inside the intermediate plate 1 is bent and built.

[0045]

According to the first aspect of the present invention, since both the heating plate and the intermediate plate are heated, they are heated from the inside and the upper and lower surfaces of the laminated molding block, so that the whole is heated to a uniform constant temperature. Therefore, it is necessary to simultaneously obtain a plurality of laminates of uniform quality without changing the degree of heating between individual laminates, and to adjust the overall heating time to the sheet-like synthetic resin material whose temperature rises slowly. As a result, the molding time can be shortened and the manufacturing lead time can be shortened.

According to the second aspect of the present invention, the intermediate plate can be heated by energizing the intermediate plate, and the amount of heat generated can be easily adjusted by adjusting the amount of energization.

According to the third aspect of the present invention, the intermediate plate can be heated by supplying a high-frequency current to the induction coil disposed around the laminated molding block. Therefore, compared to the method of conducting and heating, there is no need to connect electrodes and connect wires for wiring connection, and operations such as preparation for molding and removal of molded products are facilitated.

According to the fourth aspect of the present invention, the sheet-like synthetic resin material is placed on the lowermost intermediate plate, the intermediate plate is folded on the sheet-like synthetic resin material, and the sheet-like synthetic resin material is further placed. To form a laminated molded block. Therefore, the work of moving the intermediate plates one by one is omitted, and the work of forming the laminated molded blocks is facilitated.

According to the fifth aspect of the present invention, it is possible to heat the battery by mounting the connection connector and supplying electricity from both ends of the electrically connected intermediate plate. Therefore, the work of connecting or disconnecting the wiring to or from a large number of intermediate plates can be easily performed.

According to the sixth aspect of the present invention, the conductive foil can be heated in addition to the intermediate plate. Therefore, the heating capacity from the inside of the laminated molding block increases,
Heating can be accelerated to shorten the molding time.

According to the seventh aspect of the present invention, the intermediate plate can be cooled after the completion of the heat-press molding to cool the inside of the laminated molding block. Therefore, the entire laminated molded block can be cooled quickly and uniformly, and the molding time can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a laminated plate manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a sheet-like synthetic resin material formed into a laminate by the above-described laminate production apparatus.

FIG. 3 is an explanatory diagram showing a different configuration of a heating plate in the apparatus for manufacturing a laminated plate according to the first embodiment.

FIG. 4 is an explanatory diagram showing a configuration of a laminated plate manufacturing apparatus according to a second embodiment.

FIG. 5 is an explanatory diagram showing a connection example of an intermediate plate of the laminated plate manufacturing apparatus according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a different connection example of an intermediate plate of the laminate manufacturing apparatus in the embodiment.

FIG. 7 is a schematic cross-sectional view showing an example of a connection connector of the laminate manufacturing apparatus according to the embodiment.

FIG. 8 is an explanatory diagram showing a configuration of a laminated plate manufacturing apparatus according to a third embodiment.

FIG. 9 is a perspective view showing a specific example of an intermediate plate cooling unit of the laminated plate manufacturing apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intermediate plate 2 Sheet-shaped synthetic resin material 3 Laminate molding block 4 Heating plate 5 Intermediate plate heating device 6 High frequency induction heating device 6a Induction coil 7 Connecting member 8 Connector 9 Conductive foil 10 Conductive foil energizing device 11 Coil heater 12 Electric heater

Claims (7)

[Claims] 1. A laminated molded block is formed by alternately stacking a sheet-like synthetic resin material and an intermediate plate with an intermediate plate disposed on both upper and lower surfaces, and the laminated molded block is disposed between upper and lower heating plates. An apparatus for manufacturing a laminated plate, wherein the intermediate plate is heated and pressurized and formed by an intermediate plate heating means for heating an intermediate plate. 2. An intermediate plate heating device comprising: an intermediate plate formed of a conductive material; and an electric current supplied to the intermediate plate to heat the intermediate plate. An apparatus for manufacturing the laminate according to the above. 3. An intermediate plate is formed of a magnetic material, and a high-frequency induction heating device for high-frequency induction heating of the intermediate plate is used as an intermediate plate heating means, and the high-frequency induction device is an induction coil disposed around a laminated molding block. The apparatus for manufacturing a laminated plate according to claim 1, comprising: 4. The laminated plate manufacturing apparatus according to claim 2, wherein the intermediate plate is foldably connected by a conductive connecting member. 5. The apparatus according to claim 2, further comprising a connector for electrically connecting the intermediate plates to each other. 6. A laminate forming block comprising a conductive foil disposed on a surface of a sheet-shaped synthetic resin material, and a conductive foil energizing device for heating the conductive foil by supplying a current to the conductive foil. The apparatus for manufacturing a laminate according to any one of claims 1 to 5, characterized in that: 7. The apparatus for manufacturing a laminated board according to claim 1, further comprising an intermediate plate cooling means for cooling the intermediate plate.